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MINOR Moved sapphire/thirdparty/jsmin from an external into source tree
git-svn-id: svn://svn.silverstripe.com/silverstripe/open/modules/sapphire/trunk@92489 467b73ca-7a2a-4603-9d3b-597d59a354a9
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--- | ||
format: 1 | ||
handler: | ||
piston:remote-revision: 7 | ||
piston:uuid: d4d03eb5-ab2f-0410-8b36-bd473e2d5c71 | ||
lock: false | ||
repository_url: http://jsmin-php.googlecode.com/svn/trunk/ | ||
repository_class: Piston::Svn::Repository |
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<?php | ||
/** | ||
* jsmin.php - PHP implementation of Douglas Crockford's JSMin. | ||
* | ||
* This is pretty much a direct port of jsmin.c to PHP with just a few | ||
* PHP-specific performance tweaks. Also, whereas jsmin.c reads from stdin and | ||
* outputs to stdout, this library accepts a string as input and returns another | ||
* string as output. | ||
* | ||
* PHP 5 or higher is required. | ||
* | ||
* Permission is hereby granted to use this version of the library under the | ||
* same terms as jsmin.c, which has the following license: | ||
* | ||
* -- | ||
* Copyright (c) 2002 Douglas Crockford (www.crockford.com) | ||
* | ||
* Permission is hereby granted, free of charge, to any person obtaining a copy of | ||
* this software and associated documentation files (the "Software"), to deal in | ||
* the Software without restriction, including without limitation the rights to | ||
* use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies | ||
* of the Software, and to permit persons to whom the Software is furnished to do | ||
* so, subject to the following conditions: | ||
* | ||
* The above copyright notice and this permission notice shall be included in all | ||
* copies or substantial portions of the Software. | ||
* | ||
* The Software shall be used for Good, not Evil. | ||
* | ||
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR | ||
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, | ||
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE | ||
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER | ||
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, | ||
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE | ||
* SOFTWARE. | ||
* -- | ||
* | ||
* @package JSMin | ||
* @author Ryan Grove <ryan@wonko.com> | ||
* @copyright 2002 Douglas Crockford <douglas@crockford.com> (jsmin.c) | ||
* @copyright 2008 Ryan Grove <ryan@wonko.com> (PHP port) | ||
* @license http://opensource.org/licenses/mit-license.php MIT License | ||
* @version 1.1.1 (2008-03-02) | ||
* @link http://code.google.com/p/jsmin-php/ | ||
*/ | ||
|
||
class JSMin { | ||
const ORD_LF = 10; | ||
const ORD_SPACE = 32; | ||
|
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protected $a = ''; | ||
protected $b = ''; | ||
protected $input = ''; | ||
protected $inputIndex = 0; | ||
protected $inputLength = 0; | ||
protected $lookAhead = null; | ||
protected $output = ''; | ||
|
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// -- Public Static Methods -------------------------------------------------- | ||
|
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public static function minify($js) { | ||
$jsmin = new JSMin($js); | ||
return $jsmin->min(); | ||
} | ||
|
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// -- Public Instance Methods ------------------------------------------------ | ||
|
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public function __construct($input) { | ||
$this->input = str_replace("\r\n", "\n", $input); | ||
$this->inputLength = strlen($this->input); | ||
} | ||
|
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// -- Protected Instance Methods --------------------------------------------- | ||
|
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protected function action($d) { | ||
switch($d) { | ||
case 1: | ||
$this->output .= $this->a; | ||
|
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case 2: | ||
$this->a = $this->b; | ||
|
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if ($this->a === "'" || $this->a === '"') { | ||
for (;;) { | ||
$this->output .= $this->a; | ||
$this->a = $this->get(); | ||
|
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if ($this->a === $this->b) { | ||
break; | ||
} | ||
|
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if (ord($this->a) <= self::ORD_LF) { | ||
throw new JSMinException('Unterminated string literal.'); | ||
} | ||
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if ($this->a === '\\') { | ||
$this->output .= $this->a; | ||
$this->a = $this->get(); | ||
} | ||
} | ||
} | ||
|
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case 3: | ||
$this->b = $this->next(); | ||
|
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if ($this->b === '/' && ( | ||
$this->a === '(' || $this->a === ',' || $this->a === '=' || | ||
$this->a === ':' || $this->a === '[' || $this->a === '!' || | ||
$this->a === '&' || $this->a === '|' || $this->a === '?')) { | ||
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$this->output .= $this->a . $this->b; | ||
|
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for (;;) { | ||
$this->a = $this->get(); | ||
|
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if ($this->a === '/') { | ||
break; | ||
} elseif ($this->a === '\\') { | ||
$this->output .= $this->a; | ||
$this->a = $this->get(); | ||
} elseif (ord($this->a) <= self::ORD_LF) { | ||
throw new JSMinException('Unterminated regular expression '. | ||
'literal.'); | ||
} | ||
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$this->output .= $this->a; | ||
} | ||
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$this->b = $this->next(); | ||
} | ||
} | ||
} | ||
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protected function get() { | ||
$c = $this->lookAhead; | ||
$this->lookAhead = null; | ||
|
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if ($c === null) { | ||
if ($this->inputIndex < $this->inputLength) { | ||
$c = $this->input[$this->inputIndex]; | ||
$this->inputIndex += 1; | ||
} else { | ||
$c = null; | ||
} | ||
} | ||
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if ($c === "\r") { | ||
return "\n"; | ||
} | ||
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if ($c === null || $c === "\n" || ord($c) >= self::ORD_SPACE) { | ||
return $c; | ||
} | ||
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return ' '; | ||
} | ||
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protected function isAlphaNum($c) { | ||
return ord($c) > 126 || $c === '\\' || preg_match('/^[\w\$]$/', $c) === 1; | ||
} | ||
|
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protected function min() { | ||
$this->a = "\n"; | ||
$this->action(3); | ||
|
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while ($this->a !== null) { | ||
switch ($this->a) { | ||
case ' ': | ||
if ($this->isAlphaNum($this->b)) { | ||
$this->action(1); | ||
} else { | ||
$this->action(2); | ||
} | ||
break; | ||
|
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case "\n": | ||
switch ($this->b) { | ||
case '{': | ||
case '[': | ||
case '(': | ||
case '+': | ||
case '-': | ||
$this->action(1); | ||
break; | ||
|
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case ' ': | ||
$this->action(3); | ||
break; | ||
|
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default: | ||
if ($this->isAlphaNum($this->b)) { | ||
$this->action(1); | ||
} | ||
else { | ||
$this->action(2); | ||
} | ||
} | ||
break; | ||
|
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default: | ||
switch ($this->b) { | ||
case ' ': | ||
if ($this->isAlphaNum($this->a)) { | ||
$this->action(1); | ||
break; | ||
} | ||
|
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$this->action(3); | ||
break; | ||
|
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case "\n": | ||
switch ($this->a) { | ||
case '}': | ||
case ']': | ||
case ')': | ||
case '+': | ||
case '-': | ||
case '"': | ||
case "'": | ||
$this->action(1); | ||
break; | ||
|
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default: | ||
if ($this->isAlphaNum($this->a)) { | ||
$this->action(1); | ||
} | ||
else { | ||
$this->action(3); | ||
} | ||
} | ||
break; | ||
|
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default: | ||
$this->action(1); | ||
break; | ||
} | ||
} | ||
} | ||
|
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return $this->output; | ||
} | ||
|
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protected function next() { | ||
$c = $this->get(); | ||
|
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if ($c === '/') { | ||
switch($this->peek()) { | ||
case '/': | ||
for (;;) { | ||
$c = $this->get(); | ||
|
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if (ord($c) <= self::ORD_LF) { | ||
return $c; | ||
} | ||
} | ||
|
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case '*': | ||
$this->get(); | ||
|
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for (;;) { | ||
switch($this->get()) { | ||
case '*': | ||
if ($this->peek() === '/') { | ||
$this->get(); | ||
return ' '; | ||
} | ||
break; | ||
|
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case null: | ||
throw new JSMinException('Unterminated comment.'); | ||
} | ||
} | ||
|
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default: | ||
return $c; | ||
} | ||
} | ||
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return $c; | ||
} | ||
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protected function peek() { | ||
$this->lookAhead = $this->get(); | ||
return $this->lookAhead; | ||
} | ||
} | ||
|
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// -- Exceptions --------------------------------------------------------------- | ||
class JSMinException extends Exception {} | ||
?> |
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